CN214663673U - Composite material gas cylinder - Google Patents

Abstract

The utility model discloses a composite material gas bomb, which comprises a gas bomb body, a connecting part and a pipeline switching part, wherein the inner layer of the gas bomb body is an inner container made of plastic; the inner container comprises a bottle body, a crown-shaped seal head and a bottle opening, and the top point of at least one seal head is provided with the bottle opening; the connecting part is welded with the inner container at the bottle mouth and is respectively communicated with the bottle mouth and the pipeline switching part; the pipeline switching part comprises a gas passage and a drainage passage; the inner container is coated with a fiber winding layer. The utility model discloses compact structure, not only light in weight is in the realization effective sealed while, and bulk strength is more reliable moreover.

Description

Composite material gas cylinder

Technical Field

The utility model relates to a gas bomb technique, in particular to combined material gas bomb.

Background

The air storage cylinder is a common air storage component of equipment such as vehicles and the like, and is used for storing compressed air generated by an air compressor on the vehicles, and the compressed air is used for systems such as automobile braking, whistling and the like. Most of the traditional gas storage cylinders are made of metal materials, for example, the traditional gas storage cylinders are made of steel or aluminum alloy materials, the density of the former materials is high, the former materials do not accord with the trend of light weight of automobiles, and the interior of the former materials needs to be subjected to surface rust prevention treatment; the latter has complex forming process and high preparation cost, and the material density is still slightly higher than that of non-metal materials. Meanwhile, the gas storage cylinder made of metal materials needs to be provided with a plurality of pipeline interfaces for air inlet, air outlet, pollution discharge and water drainage, the structural process is complex, and the possibility of high-pressure medium leakage is increased due to the outlets.

In recent years, composite material gas storage bottles have appeared, which adopt a fiber full-winding forming process, generally comprise a gas storage bottle liner and a winding layer, wherein the liner is made of plastics, the winding layer is made of fibers and impregnating resin, the fibers can be reinforced materials such as glass fibers, aramid fibers, carbon fibers and the like, the impregnating resin can be an epoxy resin, a modified epoxy resin and an unsaturated resin system added with a curing agent and an accelerant, and the fibers are wound and cured on the surface of the liner according to a certain winding line type after being subjected to the impregnating resin.

For example, a chinese utility model patent publication No. CN 209386002U, issued by the authority of 2019, 9, 13, discloses a composite material gas cartridge comprising an end cap, a cartridge body, and a pipe joint; two ends of the cylinder body are symmetrically and fixedly provided with two end covers through welding; and four pipe joints are fixedly arranged on one side of each of the two end covers. The outer sides of the end cover and the cylinder body are also fixedly provided with a winding layer, the winding layer is glass fiber soaked with thermosetting resin, the winding layer is cured and combined with the cylinder body through thermosetting resin materials, the curing mode is thermosetting, the heating temperature is 130-170 ℃, and the holding time is 10-50 min. Although the gas cylinder is light in weight, the inner container is welded with a plurality of interfaces, so that the possibility of leakage is increased, and the filament fiber is difficult to wind.

Compressed air is stored in the air storage bottle for a long time, a certain amount of water is generated in the air storage bottle due to high pressure, the water needs to be discharged in time, and otherwise equipment safety is affected. But the drain pipe joint of current gas bomb has arranged the bottom at the body, has disturbed outer winding route for the fibrous layer can only twine the body, can not twine both sides head, and the intensity of head can't be guaranteed, and the joint strength of head and body also can be weak.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a combined material gas bomb, compact structure, not only light in weight is in the realization effectively sealed time, and bulk strength is more reliable moreover.

In order to solve the technical problem, the utility model discloses a technical scheme does:

a composite material gas storage bottle comprises a gas storage bottle body, a connecting part and a pipeline switching part, wherein the inner layer of the gas storage bottle body is an inner container made of plastic; the inner container comprises a bottle body, a crown-shaped seal head and a bottle opening, and the top point of at least one seal head is provided with the bottle opening; the connecting part is welded with the inner container at the bottle mouth and is respectively communicated with the bottle mouth and the pipeline switching part; the pipeline switching part comprises an inward gas passage and a drain pipe, the inward gas passage is communicated with the inner space of the inner container at the bottle mouth, and the drain pipe penetrates through the bottle mouth and extends to the bottom of the inner container; the inner container is coated with a fiber winding layer.

Preferably, the connecting part comprises a metal insert, the metal insert is wrapped by plastic, and the wrapped plastic is welded with the inner container.

Preferably, the pipeline switching part is at least provided with an outward gas passage, the outward gas passage is communicated with the inward gas passage, and the outward gas passage is communicated with the gas passage extension pipe; the pipeline switching part is provided with a drainage passage, the drainage passage comprises a drainage cavity, one end of the drainage cavity extends towards the inside of the pipeline switching part and is communicated with a drainage pipe, and the other end of the drainage cavity extends towards the outside of the pipeline switching part.

Preferably, the other end of the drainage cavity is communicated with a drainage extension pipe, and the drainage extension pipe is connected with a drainage valve or a differential pressure drainage device.

Preferably, the pipeline switching part comprises a connecting column, and the drain pipe and the inward gas passage are arranged in parallel and separated from each other in the connecting column.

Preferably, the pipeline switching part comprises a connecting column, and the drain pipe is sleeved in the inward gas passage in the connecting column.

Preferably, the inward gas passage comprises a first section of inward gas passage and a second section of inward gas passage, the drain pipe is sleeved in the first section of inward gas passage, the second section of inward gas passage is communicated with the gas path adapter pipe, and the side surface of the gas path adapter pipe is communicated with at least one bronchus.

Preferably, the drain pipe and the first section inward gas passage are arranged in parallel and separated from each other.

Preferably, the pipeline switching part II is further included, the pipeline switching part II comprises the inward gas passage and/or the drain pipe, a bottle mouth is arranged at the top point of each of the two sealing heads of the liner, the liner is respectively communicated with the two connecting parts through the two bottle mouths, one connecting part is communicated with the pipeline switching part, and the other connecting part is communicated with the pipeline switching part II.

Preferably, the fiber winding device further comprises a protective cover, wherein the protective cover is of a shell structure and is tightly sleeved on the side surface of the fiber winding layer, and a short tubular sleeve is arranged on the protective cover.

Compared with the prior art, the utility model discloses following beneficial effect has been produced:

the composite material gas storage bottle of the utility model adopts the welding connection of the connecting part and the inner container, and the connecting part is respectively communicated with the inner container and the pipeline switching part, so that the connecting part and the pipeline switching part inside the inner container form a continuous sealed space; the gas storage bottle is characterized in that only one bottle opening is arranged on the inner container, the connecting part is respectively communicated with the inner container and the pipeline switching part, an inward gas passage penetrates through the connecting part to reach the bottle opening and is communicated with the fluid inlet and the fluid outlet, and the drain pipe penetrates through the fluid inlet and the fluid outlet of the bottle opening and extends to the bottom inside the inner container, so that the number of openings of the inner container is reduced while gas inlet, gas outlet and water drainage of the gas storage bottle are realized, the structure is compact, the fiber winding layer can cover more sealing head surfaces, the sealing performance of the gas storage bottle is improved, and the leakage risk is reduced; meanwhile, the area of the gas cylinder body coated with the fiber winding layer is larger, and the overall strength of the gas cylinder body is enhanced.

Drawings

Fig. 1 is an exploded view of a first embodiment of the present invention;

fig. 2 is a longitudinal sectional view of a first embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is an exploded view of a pipeline adapter according to a first embodiment of the present invention;

fig. 5 is an angular perspective view of a shield according to an embodiment of the present invention;

fig. 6 is a sectional view of a pipeline adapter according to a second embodiment of the present invention;

fig. 7 is an exploded view of a third embodiment of the present invention;

fig. 8 is a cross-sectional view of a pipeline adapter according to a third embodiment of the present invention;

fig. 9 is a cross-sectional view of a fourth embodiment of the present invention.

In the figure:

1-a gas cylinder body, 11-a cylinder body, 12-a sealing head, 13-a bottle mouth, 131-a fluid inlet and outlet, 14-an inner container, 141-a lining shoulder accommodating part and 15-a fiber winding layer;

2-connecting part, 21-metal insert, 211-metal sealing bearing platform, 212-mounting part, 213-disc, 22-lining shoulder, 221-plastic sealing bearing platform, 23-bottle mouth containing part and 24-sealing ring;

3-a pipeline switching part, 31-a drain pipe, 32-a drain cavity, 33-a drain extension pipe, 34-an inward gas passage, 341-a first inward gas passage, 342-a second inward gas passage, 35-an outward gas passage, 36-a gas passage extension pipe, 37-a connecting column, 38-a gas passage switching pipe and 39-a bronchus;

3' -a pipeline switching part II;

4-protective cover, 41-sleeve and 42-reinforcing rib.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The utility model provides a combined material gas bomb for the compressed air who stores air compressor production on the vehicle, compressed air is used for automobile braking, whistling etc. system. The gas storage bottle comprises a gas storage bottle body 1, a connecting part 2 and a pipeline switching part 3. The inner layer of the gas cylinder body 1 is an inner container 14 made of plastics, and the inner container 14 comprises a cylinder body 11, a seal head 12 and a cylinder opening 13. The inner container 14 may be integrally formed by a process such as blow molding or rotational molding, or may be formed by welding two symmetrical plastic members.

The inner container 14 is communicated with the connecting part 2 through the bottle mouth 13, the connecting part 2 is communicated with the pipeline switching part 3, and the pipeline switching part 3 comprises a gas passage and a drainage passage. The liner 14 is used for storing compressed air and comprises a crown-shaped closure 12, and a bottle mouth 13 is arranged at the vertex of at least one closure 12. The connecting part 2 realizes the sealing communication between the inner container 14 and the pipeline switching part 3.

The gas bomb body 1 is coated with the fiber winding layer 15, the fiber winding layer 15 is formed by filament fibers through resin infiltration treatment, the resin can be thermosetting resin or thermoplastic resin, the thermosetting resin and the filament fibers form the high-strength fiber winding layer 15 after being cured at a proper temperature, the high-strength fiber winding layer can bear the pressure of compressed air, and the gas bomb is maintained to be not deformed unstably and burst. The thermosetting resin can be epoxy resin, vinyl resin or polyurethane resin, the thermoplastic resin can be selected from polyether ether ketone (PEEK), polyphenylene sulfide (PPS), Polyetherimide (PEI), polyether sulfone (PES), Polyamide (PA), polyamide imide (PAI), Polyimide (PI) and the like, and the filament fiber can be one or more of glass fiber, carbon fiber, aramid fiber or basalt fiber. The specific gravity of the plastic, the resin and the filament fiber is lower than that of steel or aluminum, so that the weight of the gas storage bottle is reduced, and the light weight is realized when the plastic, the resin and the filament fiber are applied to vehicles. The inner container 14 made of plastic is corrosion resistant, can not be rusted when being contacted with water, and is superior to the gas storage cylinder made of metal materials such as steel or aluminum.

Example one

As shown in fig. 1 and 2, the inner container 14 includes a cylindrical bottle body 11 and two crown closures 12, the two closures 12 are oppositely disposed at two ends of the bottle body 11, and the arc of the closure 12 protrudes toward the outside of the bottle body 11.

As shown in fig. 3, a bottle mouth 13 is arranged at the vertex of one of the sealing heads 12, the bottle mouth 13 is a hollow circular truncated cone or a hollow cylinder, the hollow part of the bottle mouth 13 is a fluid inlet/outlet 131 which is a passage for compressed gas to enter and exit the inner container 14 and is communicated with the inner space of the inner container 14, the fluid inlet/outlet 131 and the bottle mouth 13 are coaxial, and the bottle mouth 13 and the inner container 14 are coaxial. The root of bottleneck 13 sets up the inside sunken lining shoulder portion 141 of holding to inner bag 14, and lining shoulder portion 141 and inner bag 14 integrated into one piece for with connecting portion 2 adaptation connection, the cross section of lining shoulder portion 141 is circular to coaxial with inner bag 14.

The connecting part 2 is used for connecting the inner container 14 and the pipeline switching part 3. The connecting part 2 is a composite structure and comprises a metal insert 21 for enhancing the structural strength, and the surface of the metal insert 21 is coated with plastic. The connecting part 2 is generally manufactured by an injection molding process, and may also be manufactured by other plastic molding processes, such as 3D printing. One end of the metal insert 21 is provided with a short pipe-shaped mounting part 212 for connecting the pipeline adapter part 3, a screw thread is formed on the inner wall of the mounting part 212 for connecting the pipeline adapter part 3, and a metal sealing bearing platform 211 protruding towards the axis of the inner container 14 is further arranged at the end part of the screw thread. The other end of the metal insert 21 is a disc 213, and the disc 213 extends radially along the mounting portion 212 and is coaxial with the mounting portion 212. The mounting portion 212 and the disk 213 may be integrally formed or may be formed by welding two separate members. The disk 213 is closer to the bladder 14 than the threads, and the metal seal retainer 211 is more specifically disposed on the inner wall of the mounting portion 212 between the threads and the disk 213. From the end position of the screw thread, the plastic continuously covers at least three parts of the metal sealing bearing platform 211, the rest inner wall of the mounting part 212 except the screw thread and the surface of the disc 213 positioned at one side of the inner container 14, and the covered plastic can also extend, or only continuously cover the surface of the disc 213 positioned at the other side of the inner container 14, or continuously cover the surface of the disc 213 positioned at the other side of the inner container 14 and the outer wall of the mounting part 212. The disc 213 is covered with plastic and forms a shoulder 22, in particular, the fiber winding layer 15 covers completely the surface of the shoulder 22 remote from the liner or only partially the surface of the shoulder 22 remote from the liner. After the plastic is coated, a plastic sealing bearing platform 221 is formed on the surface of the metal sealing bearing platform 211, and a bottle mouth accommodating part 23 is formed on the inner wall of the mounting part 212 between the plastic sealing bearing platform 221 and the lining shoulder 22. A sealing ring 24 is arranged on the surface of the plastic sealing platform 221 near the thread end for sealing between the line adapter 3 and the connection part 2. The mouthpiece receiving section 23 is adapted to the mouthpiece 13.

The connecting portion 2 is welded to the liner 14, and more specifically, the mouthpiece accommodating portion 23 is welded to the mouthpiece 13, or the shoulder 22 is welded to the shoulder accommodating portion 141, or both the mouthpiece accommodating portion 23 and the mouthpiece 13 and the shoulder 22 are welded to the shoulder accommodating portion 141.

The pipeline switching part 3 is in threaded connection with the connecting part 2, and communication between an external pipeline and the inner space of the inner container 14 is achieved. As shown in fig. 3 and 4, the tube adapter 3 is disc-shaped, and the cross section of the tube adapter 3 may be circular, elliptical, or polygonal. The line transition 3 comprises a cylindrical connecting column 37 and a gas passage. The connecting column 37 is located on a bottom surface of the pipeline switching part 3 close to the connecting part 2, an external thread is arranged on the cylindrical surface of the connecting column 37, the external thread of the connecting column 37 is matched with the internal thread of the mounting part 212, when the connecting column 37 is gradually screwed into the mounting part 212, the end head of the connecting column 37 finally compresses the sealing ring 24 arranged on the plastic sealing bearing platform 221, and the pipeline switching part 3 and the connecting part 2 are sealed. The gas passages include an inward gas passage 34, at least one outward gas passage 35. The inward gas passage 34 penetrates through the connecting column 37, passes through the connecting part 2, reaches the bottle mouth 13, is communicated with the fluid inlet and outlet 131, and is communicated with the outward gas passage 35 in the pipeline switching part 3, so that the inward gas passage 34 is directly communicated with the inner space of the inner container 14, and the rest outward gas passages 35 are indirectly communicated with the inner space of the inner container 14 through the inward gas passage 34. It can be seen that the tube adapter 3 converts the outward gas passage 35 into an inward gas passage 34, and the converted inward gas passage 34 communicates with the inner space of the inner container 14. One end of each outward gas passage 35 is communicated with the inward gas passage 34 inside the pipe adapter 3, and the other end is communicated with the gas path extension pipe 36.

The pipeline switching part 3 is also provided with a drainage passage for draining accumulated water in the inner space of the inner container 14. The drainage passage comprises a drainage cavity 32 and a drainage pipe 131, the drainage cavity 32 is located in the pipeline adapter part 3, one end of the drainage cavity 32 extends towards the interior of the pipeline adapter part 3 and is communicated with one end of the drainage pipe 31, and the other end of the drainage pipe 31 penetrates through the connecting column 37 and the fluid inlet and outlet 131 to extend to the bottom of the interior of the liner 14 and effectively contacts with a water accumulation part in the liner 14. Inside the connecting column 37, the drain pipe 31 and the inward air passage 34 are arranged in parallel spaced apart from each other. The other end of the drainage cavity 32 extends to the outside of the pipeline adapter 3 and is communicated with a drainage extension pipe 33, and a drainage valve or a differential pressure drainage device can be arranged on the drainage extension pipe 33.

Since the outward gas passage 35 is communicated with the inward gas passage 34, and the inward gas passage 34 is communicated with the inner space of the inner container 14, the outward gas passage 35, the inward gas passage 34, and the inner space of the inner container 14 together form a communicating vessel, the compressor can supplement compressed air into the communicating vessel through any one of the outward gas passages 35, and the compressed air flows to each required part of the vehicle through the other outward gas passages 35 to provide pressure required by work for each required part. When the air is compressed, moisture in the air is changed into liquid from gas state and remains in the inner container 14, the inner container 14 is a closed container, and the moisture is difficult to evaporate, so that the normal work of certain required parts of a vehicle can be influenced, hidden danger is caused to the safe use of the vehicle, and the hidden danger needs to be discharged. When the water is drained, the drain valve is opened, when the internal pressure of the inner container 14 is greater than the standard atmospheric pressure, the residual liquid water in the inner container 14 can be drained from the drain passage, and the valve is closed after the water is drained. When the differential pressure drainage device is used, the differential pressure drainage device is a one-way valve, when the internal pressure of the liner 14 is smaller than the elastic force of the compressed spring of the one-way valve and is greater than the standard atmospheric pressure, the one-way valve is opened, residual liquid water in the liner 14 can be drained from a drainage passage due to differential pressure, and when the internal pressure of the liner 14 is greater than the spring pressure yield force of the one-way valve, the one-way valve is closed.

The bottle mouth 13 and the lining shoulder accommodating part 141 are arranged on the seal head 12 and are integrally formed with the seal head 12, the seal head 12 is a part forming the inner container 14, the inner container 14 is integrally formed or welded, and the inner container 14 and the connecting part 2 are continuously coated on the metal insert 21 and welded by plastics, so that a continuous sealing inner surface is formed inside the connecting part 2 and the inner container 14, and the connecting part 2 and the inner container 14 are reliably sealed. The metal insert 21 can withstand the pressure of the compressed air in all directions and enhance the mechanical strength of the mounting portion 212, thereby providing a reliable seal. The sealing ring 24 is arranged on the surface of the plastic sealing bearing platform 221 close to the end position of the thread, when the connecting column 37 of the pipeline adapter part 3 is gradually screwed into the mounting part 212, the end of the connecting column 37 finally compresses the sealing ring 24 arranged on the plastic sealing bearing platform 221, and reliable sealing of the pipeline adapter part 3 and the connecting part 2 is realized. The inner container 14 and the connecting part 2, the connecting part 2 and the pipeline switching part 3 are both reliably sealed, and the sealing of the gas storage bottle is integrally realized.

Only one bottle mouth 13 is arranged on the inner container 14, the connecting part 2 is respectively communicated with the inner container 14 and the pipeline adapter part 3, the inward gas passage 34 penetrates through the connecting part 2 to reach the bottle mouth 13 and is communicated with the fluid inlet and outlet 131, and the drain pipe 31 penetrates through the fluid inlet and outlet 131 of the bottle mouth 13 and extends to the inner bottom of the inner container 14, so that the number of openings of the gas storage bottle is optimized and reduced while gas inlet, gas outlet and water drainage of the gas storage bottle are realized, and the leakage risk is reduced.

In this embodiment, as shown in fig. 1 and 5, a protective cover 4 is further disposed outside the pipeline adapter 3 to protect the end socket 12 and the pipeline adapter 3, limit displacement of the pipeline adapter 3 relative to the connecting portion 2, and further strengthen connection between the pipeline adapter 3 and the connecting portion 2. The protection casing 4 is shell structure, and the pipeline switching portion 3 can be held to the inner chamber to the protection casing 4 closely overlaps in the side surface of fibre winding layer 15. The protective cover 4 is made of plastic and is integrally formed through injection molding.

As shown in fig. 2, 4 and 5, one end of the air path extension tube 36 on the pipeline adapter part 3 is connected with one end of the outward air path 35 far away from the bottle mouth 13, and the other end of the air path extension tube 36 passes through the protective cover 4. A drain extension tube 33 is connected to the end of the drain passage remote from the mouth 13 and the other end also passes through the shield 4. A short tubular sleeve 41 is arranged on the outer surface of the protective cover 4, and the air path extension pipe 36 and the water discharge extension pipe 33 penetrate through the sleeve 41 and are tightly sleeved on the inner surface of the sleeve 41. A sheet-shaped reinforcing rib 42 is disposed on the outer surface of the sleeve 41, one end of the reinforcing rib 42 is connected to the outer surface of the sleeve 41, and the other end is connected to the outer surface of the shield 4 for increasing the support of the sleeve 41.

The inseparable suit of protection casing 4 is in the side surface of fibre winding layer 15, pipeline switching portion 3 is connected with protection casing 4 through gas circuit extension pipe 36 and drainage extension pipe 33, the spliced pole 37 and the connecting portion 2 of pipeline switching portion 3 are connected, and then the suit can restrict pipeline switching portion 3 and produce the displacement for connecting portion 2 at protection casing 4 of 15 side surfaces of fibre winding layer, consolidate being connected of pipeline switching portion 3 and connecting portion 2, strengthen pipeline switching portion 3 and connecting portion 2 sealed, the risk of revealing has been reduced.

Example two

The present embodiment provides only a different manner of the gas passage and the drain passage in the pipe adapter 3 from the first embodiment, and the other structures are the same as the first embodiment, and the description of the same parts will not be repeated.

In this embodiment, a part of the drain passage is fitted to a part of the gas passage. As shown in fig. 6, the drain pipe 31 is housed in the inward gas passage 34 inside the connecting column 37. When the connecting part 2 is in threaded connection with the pipeline switching part 3, the inward gas passage 34 is communicated with the fluid inlet and outlet 131, the drain pipe 31 passes through the fluid inlet and outlet 131 to be communicated with the inner space of the liner 14, the drain pipe 31 and the inward gas passage 34 form a sleeving structure, the space is saved, the size of the connecting part 2 can be reduced, particularly the external size of the mounting part 212 is reduced, a smaller pole hole can be formed at the position of the mounting part 212 when fibers are wound, the area of the connecting part 2 coated by the fiber winding layer 15 is increased, the pressure is applied to the connecting part 2 by the compressed air in the liner 14, the fiber winding layer 15 with the smaller pole hole can provide a reaction force for the larger surface of the connecting part 2, so that the unstable deformation and even the flying-out of the connecting part 2 can be better controlled, more reliable sealing is further provided, and the overall strength of the gas storage bottle body 1 is also enhanced.

EXAMPLE III

The present embodiment provides a further pipeline adapter 3 different from the first embodiment, and other structures are the same as the first embodiment, and the description of the same parts as the first embodiment will not be repeated.

In the present embodiment, as shown in fig. 7 and 8, the tube adapter 3 is also provided with a gas passage including an inward gas passage 34 communicating with the inner space of the liner 14 and at least one outward gas passage 35, and the outward gas passage 35 communicates with the inward gas passage 34.

The inward gas passage 34 includes a first inward gas passage 341 and a second inward gas passage 342, the drain pipe 31 is sleeved in the first inward gas passage 341, the drain pipe 31 may be arranged in parallel with the first inward gas passage 341 in a separated manner, the drain pipe 31 is connected to a drain extension pipe 33, the drain extension pipe 33 is in a short pipe shape, and a valve or a differential pressure drain device may be provided. The second inward gas passage 342 extends from the side surface of the main body of the pipe transition part 3 toward the center of the main body of the pipe transition part 3, and communicates with the first inward gas passage 341 that passes through the main body of the pipe transition part 3 and the connecting column 37, and the first inward gas passage 341 communicates with the inner space of the inner container 14. The second section of inward gas passage 342 is communicated with the gas path adapter tube 38, the gas path adapter tube 38 is connected with the main body of the pipeline adapter part 3, the gas path adapter tube 38 is in a short tube shape, and the side surface of the gas path adapter tube is communicated with at least one short tube-shaped bronchus 39. The air passage from the opening of the inward air passage 34 on the side of the body of the tube changeover portion 3 through the bronchus 39 is the outward air passage 35.

When in use, the outward air passage 35 is communicated with the inward air passage 34, and the inward air passage 34 is communicated with the inner space of the inner container 14, so that the outward air passage 35, the inward air passage 34 and the inner space of the inner container 14 form a communicating vessel together, the compressor can supplement compressed air into the communicating vessel through any outward air passage 35, and the compressed air flows to each required part of the vehicle through the rest outward air passages 35 to provide pressure required by work for each required part. When drainage is required, drainage can be achieved through a valve or a differential pressure drainage device.

The main body of the pipeline switching part 3 provided in this embodiment is only provided with the inward gas passage 34, the outward gas passage 35 is arranged in the gas passage switching pipe 38, the gas passage switching pipe 38 can select a standard component, and compared with the pipeline switching part 3 in the first embodiment, the pipeline switching part 3 provided in this embodiment has simple structure and manufacture and processing, and is low in cost.

Example four

As shown in fig. 9, the difference between the present embodiment and the first embodiment is that the composite gas cylinder provided in the present embodiment has bottle openings 13 at the vertexes of the two sealing caps 12 of the liner 14, and the liner 4 is respectively communicated with the two connecting portions 2 through the two bottle openings 13. One of the connection portions 2 communicates with the line adapter portion 3, one specific structure of the line adapter portion 3 has been described in the first embodiment, and another specific structure of the line adapter portion 3 has been described in the second embodiment. The other connection 2 communicates with a line junction ii 3 ', in one case the line junction ii 3 ' is identical to the line junction 3 already described in the first embodiment, in the other case the line junction ii 3 ' is identical to the line junction 3 already described in the second embodiment, the line junction 3 described in the first and second embodiments comprising a gas passage comprising an inward gas passage 34 and a drain passage comprising a drain 31. It is to be noted in particular that in yet another case the line junction ii 3' either comprises the inward gas passage 34 without the drain 31 or the drain 31 does not comprise the inward gas passage 34.

Although a plurality of embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims (10)

1. A composite gas cylinder is characterized in that: the gas storage bottle comprises a gas storage bottle body (1), a connecting part (2) and a pipeline switching part (3), wherein the inner layer of the gas storage bottle body (1) is an inner container (14) made of plastics; the inner container (14) comprises a bottle body (11), a crown-shaped seal head (12) and a bottle opening (13), and the top of at least one seal head (12) is provided with the bottle opening (13); the connecting part (2) is welded with the liner (14) at the bottle mouth (13) and is respectively communicated with the bottle mouth (13) and the pipeline switching part (3); the pipeline adapter part (3) comprises an inward gas passage (34) and a drain pipe (31), the inward gas passage (34) is communicated with the inner space of the inner container (14) at the bottle opening (13), and the drain pipe (31) penetrates through the bottle opening (13) and extends to the bottom of the inner part of the inner container (14); the inner container (14) is coated with a fiber winding layer (15).

2. The composite gas cylinder according to claim 1, characterized in that: the connecting part (2) comprises a metal insert (21), the metal insert (21) is wrapped by plastic, and the wrapped plastic is welded with the inner container (14).

3. The composite gas cylinder according to claim 1, characterized in that: the pipeline switching part (3) is at least provided with an outward gas passage (35), the outward gas passage (35) is communicated with the inward gas passage (34), and the outward gas passage (35) is communicated with a gas passage extension pipe (36); the pipeline switching part (3) is provided with a drainage passage, the drainage passage comprises a drainage cavity (32), one end of the drainage cavity (32) extends towards the inside of the pipeline switching part (3) and is communicated with a drainage pipe (31), and the other end of the drainage cavity (32) extends towards the outside of the pipeline switching part (3).

4. The composite gas cylinder according to claim 3, characterized in that: the other end of the drainage cavity (32) is communicated with a drainage extension pipe (33), and the drainage extension pipe (33) is connected with a drainage valve or a differential pressure drainage device.

5. The composite gas cylinder according to claim 1, characterized in that: the pipeline switching part (3) comprises a connecting column (37), and in the connecting column (37), the drain pipe (31) and the inward gas passage (34) are arranged in parallel and separated from each other.

6. The composite gas cylinder according to claim 1, characterized in that: the pipeline switching part (3) comprises a connecting column (37), and the drain pipe (31) is sleeved in the inward gas passage (34) in the connecting column (37).

7. The composite gas cylinder according to claim 1, characterized in that: the inward gas passage (34) comprises a first section of inward gas passage (341) and a second section of inward gas passage (342), the drain pipe (31) is sleeved in the first section of inward gas passage (341), the second section of inward gas passage (342) is communicated with the gas path adapter pipe (38), and the side surface of the gas path adapter pipe (38) is communicated with at least one branch gas pipe (39).

8. The composite gas cylinder according to claim 7, characterized in that: the drain pipe (31) and the first section inward air passage (341) are arranged in parallel and separated from each other.

9. The composite gas cylinder according to any one of claims 1 to 8, characterized in that: the pipeline switching part II (3 ') comprises the inward gas passage (34) and/or the drain pipe (31), the top points of the two sealing heads (12) of the inner container (14) are respectively provided with a bottle mouth (13), the inner container (14) is respectively communicated with the two connecting parts (2) through the two bottle mouths (13), one connecting part (2) is communicated with the pipeline switching part (3), and the other connecting part (2) is communicated with the pipeline switching part II (3').

10. The composite gas cylinder according to any one of claims 1 to 8, characterized in that: still include protection casing (4), protection casing (4) are shell structure, and closely the suit is at the side surface of fibre winding layer (15), sets up short tubulose sleeve pipe (41) on protection casing (4).

Images